In-situ Physical Adjoint Computing in multiple-scattering electromagnetic environments for wave control
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916663580950528 |
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| author | Guillamon, John Wang, Cheng-Zhen Lin, Zin Kottos, Tsampikos |
| author_facet | Guillamon, John Wang, Cheng-Zhen Lin, Zin Kottos, Tsampikos |
| contents | Controlling electromagnetic wave propagation in multiple scattering systems is a challenging endeavor due to the extraordinary sensitivity generated by strong multi-path contributions at any given location. Overcoming such complexity has emerged as a central research theme in recent years, motivated both by a wide range of applications -- from wireless communications and imaging to optical micromanipulations -- and by the fundamental principles underlying these efforts. Here, we show that an {\it in-situ} manipulation of the myriad scattering events, achieved through time- and energy-efficient adjoint optimization (AO) methodologies, enables {\it real time} wave-driven functionalities such as targeted channel emission, coherent perfect absorption, and camouflage. Our paradigm shift exploits the highly multi-path nature of these complex environments, where repeated wave-scattering dramatically amplifies small local AO-informed system variations. Our approach can be immediately applied to in-door wireless technologies and incorporated into diverse wave-based frameworks including imaging, power electronic and optical neural networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_21107 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | In-situ Physical Adjoint Computing in multiple-scattering electromagnetic environments for wave control Guillamon, John Wang, Cheng-Zhen Lin, Zin Kottos, Tsampikos Signal Processing Chaotic Dynamics Optics Controlling electromagnetic wave propagation in multiple scattering systems is a challenging endeavor due to the extraordinary sensitivity generated by strong multi-path contributions at any given location. Overcoming such complexity has emerged as a central research theme in recent years, motivated both by a wide range of applications -- from wireless communications and imaging to optical micromanipulations -- and by the fundamental principles underlying these efforts. Here, we show that an {\it in-situ} manipulation of the myriad scattering events, achieved through time- and energy-efficient adjoint optimization (AO) methodologies, enables {\it real time} wave-driven functionalities such as targeted channel emission, coherent perfect absorption, and camouflage. Our paradigm shift exploits the highly multi-path nature of these complex environments, where repeated wave-scattering dramatically amplifies small local AO-informed system variations. Our approach can be immediately applied to in-door wireless technologies and incorporated into diverse wave-based frameworks including imaging, power electronic and optical neural networks. |
| title | In-situ Physical Adjoint Computing in multiple-scattering electromagnetic environments for wave control |
| topic | Signal Processing Chaotic Dynamics Optics |
| url | https://arxiv.org/abs/2503.21107 |